Take it seriously, because you never know what might come of it.
I had those same issues that began about a year ago and they continue (to a much lesser extent) to the present. I was 39 last summer and the "blues" you get when you turn 40 hit me a year early. I was worried to the point of unhealthiness about things way beyond my control. Truthfully, I had spent most of my life as a worst-case scenario type of person, but last year, it really began to affect me physically.
The symptoms had got to the point where I went to the doctor. I was (rightly) diagnosed with anxiety issues. So I took some mild anti-anxiety medicine at my discretion, and for about a half-year, it seemed to calm things down.
Then, 'round about February, I began to have the same physical symptoms without me putting any self-inflicted anxiety upon myself. I cover college hoops, so February is pretty much where the travel grind and stress of the job is at its worst.
I went back to my doctor to talk about it and she sent me to a heart specialist with the idea of calming me down and putting my mind at ease that I didn't have a physical problem when I was experiencing my anxiety symptoms.
So I went. Did the whole nine yards. Stress test, echocardiogram, etc. I thought through most of the process that it was going to be a costly waste of my time and money, and frankly, I felt a little bit ashamed that my anxiety had got to the point where I felt the need to do this.
But at the same time, those symptoms -- chest pain, chronic light-headedness, occasional numbness in extremities, etc. -- continued and were definitely exacerbated by stress.
Turns out I did have a problem. My stress test revealed an 85 percent chance of a heart blockage. So I went in for a heart catheterization last month.
Fortunately, it revealed that I didn't have a blockage, but I did have a congenital heart valve problem. It's not life-threatening and its not serious so long as I monitor it, but it explained a lot of the physical issues I had been having, especially the chest pain and the light-headedness.
I tell this story for two reasons, because obviously, everyone's own story will turn out differently.
One, take it seriously and treat it. As illustrated, it led me down a path where I learned an important lesson about my own physical condition.
But even if you don't, it goes to point number two -- there is no shame in having anxiety issues. I think a LOT of men aged 30 and over have these issues and they are often treated by society as a whole as something to be embarrassed about.
Call it anxiety, mid-life crisis, whatever, at some point I think most men have this happen at some point in their lives, especially since there's no physical trigger for men to mark time in their lives. More men need to be open about it.
Treat it and you'll be fine. Like Shockey said, if you take medication, it might take a while to find your balance. I take a very mild medication and it suits me fine. Frankly, I don't even notice it, aside from the fact it eases my symptoms.
Hope that helps.